946 MS-DRG: REHABILITATION WITHOUT CC/MCC
MS-DRG 946 groups Medicare inpatient hospital stays for: REHABILITATION WITHOUT CC/MCC. This is a medical MS-DRG. It falls under MDC 23 (Factors Influencing Health Status and Other Contacts with Health Services).
Payment & Classification Data
Official CMS values from the FY2027 IPPS Final Rule Table 5.
| Major Diagnostic Category | MDC 23 — Factors Influencing Health Status and Other Contacts with Health Services |
| DRG Type | Medical |
| Severity Level | None |
| Relative Weight | 1.1051 |
| Relative Weight (10% Cap Applied) | 1.1051 |
| Geometric Mean Length of Stay | 4 days |
| Arithmetic Mean Length of Stay | 5.3 days |
| Post-Acute Transfer DRG | Yes |
| Special Pay Transfer DRG | No |
Defining Codes (FY2027)
2 diagnosis codes can drive assignment here: Z44.8, Z44.9.
1,258 procedure codes appear in its surgical logic (Rehabilitation: 1,258): F003GKZ, F003GMZ, F003GPZ, F003GYZ, F003GZZ, F00Z01Z, F00Z02Z, F00Z0KZ, F00Z0ZZ, F00Z11Z, F00Z12Z, F00Z19Z and 1,246 more.
From the CMS MS-DRG Definitions Manual (Appendices B and E). Assignment also depends on severity, discharge status and the rest of the claim.
Contextual Map
Every relationship of 946 in one view: hierarchy, official tabular instructions in both directions, clinical classification, risk adjustment, MS-DRG participation, index terms and change history — each edge carrying the CMS source it derives from.
Major Diagnostic Category
- MDC 23 — Factors Influencing Health Status and Other Contacts with Health Services[MDC]— CMS MS-DRG Definitions Manual · FY2027
Defining diagnoses
- Z44.8 — Encounter for fitting and adjustment of other external prosthetic devices[Grouper diagnosis]— CMS MS-DRG Definitions Manual (Appendix B) · FY2027
- Z44.9 — Encounter for fitting and adjustment of unspecified external prosthetic device[Grouper diagnosis]— CMS MS-DRG Definitions Manual (Appendix B) · FY2027
Defining procedures (1258)
- F003GKZ — Communicative/Cognitive Integration Skills Assessment of Neurological System - Whole Body using Audiovisual Equipment[Grouper procedure]— CMS MS-DRG Definitions Manual (Appendix E) · FY2027
- F003GMZ — Communicative/Cognitive Integration Skills Assessment of Neurological System - Whole Body using Augmentative / Alternative Communication Equipment[Grouper procedure]— CMS MS-DRG Definitions Manual (Appendix E) · FY2027
- F003GPZ — Communicative/Cognitive Integration Skills Assessment of Neurological System - Whole Body using Computer[Grouper procedure]— CMS MS-DRG Definitions Manual (Appendix E) · FY2027
- F003GYZ — Communicative/Cognitive Integration Skills Assessment of Neurological System - Whole Body using Other Equipment[Grouper procedure]— CMS MS-DRG Definitions Manual (Appendix E) · FY2027
- F003GZZ — Communicative/Cognitive Integration Skills Assessment of Neurological System - Whole Body[Grouper procedure]— CMS MS-DRG Definitions Manual (Appendix E) · FY2027
- F00Z01Z — Filtered Speech Assessment using Audiometer[Grouper procedure]— CMS MS-DRG Definitions Manual (Appendix E) · FY2027
- F00Z02Z — Filtered Speech Assessment using Sound Field / Booth[Grouper procedure]— CMS MS-DRG Definitions Manual (Appendix E) · FY2027
- F00Z0KZ — Filtered Speech Assessment using Audiovisual Equipment[Grouper procedure]— CMS MS-DRG Definitions Manual (Appendix E) · FY2027
- and 1250 more
DRG family
- DRG 945 — REHABILITATION WITH CC/MCC[DRG family]: “REHABILITATION WITH CC/MCC — same CMS DRG family (945-946), split by severity.”— CMS MS-DRG Definitions Manual (DRG family 945-946) · FY2027
Read from: CMS MS-DRG Definitions Manual (incl. Appendix B diagnosis index, Appendix C CC/MCC list, Appendix E procedure index) and IPPS Final Rule tables — v44. All data sources · How to read the labels · How MedCoder verifies its implementation
Current data releases:ICD-10-CM FY2027 · ICD-10-PCS FY2027 · HCPCS October 2026 · MS-DRG v44 · Medicare Code Editor v44.0 · NCCI PTP Q4 2026 · MUE Q4 2026 · NCD code lists 2026-01 · LCD export September 20, 2026 · All releases and sources